|
%I #12 Sep 22 2013 04:50:50
%S 1,1,1,1,1,1,3,8,15,30,60,120,241,482,964,1928,3856,7712,15422,30842,
%T 61682,123362,246722,493446,986896,1973790,3947580,7895160,15790320,
%U 31580642,63161284,126322568,252645136,505290272,1010580544,2021161084
%N Number of subsets of {1,2,3,...,n} that sum to 0 mod 17.
%F Empirical G.f.: -(2*x^17-x^12+x^8-2*x^7-x^6+x^5+x^4+x^3+x^2+x-1) / ((2*x-1)*(2*x^17-1)). [_Colin Barker_, Dec 22 2012]
%o (PARI) {A068038(n)=local(v,v1);v=vector(17);v[1]=1;for(i=1,n,v1=vector(17);for(j=0,16,v1[j+1]=v[j+1]+v[(j-i)%17+1]);v=v1);v[1]} (_Max Alekseyev_, Jul 23 2005))
%Y 17th row of A068009.
%K nonn
%O 0,7
%A _Antti Karttunen_, Feb 11 2002
%E Rechecked by _Max Alekseyev_, Jul 23 2005
|
